CN114006499A - Roller blind motor comprising a reverse braking actuator - Google Patents
Roller blind motor comprising a reverse braking actuator Download PDFInfo
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- CN114006499A CN114006499A CN202111319846.8A CN202111319846A CN114006499A CN 114006499 A CN114006499 A CN 114006499A CN 202111319846 A CN202111319846 A CN 202111319846A CN 114006499 A CN114006499 A CN 114006499A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a roller shutter motor comprising a reverse braking driver, wherein the reverse braking driver is arranged in the motor. The invention relates to a reverse braking driver, which aims at solving the problems of insufficient reverse braking reliability and potential safety hazard of the existing transmission structure.
Description
Technical Field
The invention relates to the field of motors, in particular to a roller shutter motor comprising a driver for reverse braking.
Background
The traditional device that adopts the motor as output power, for example elevator, roll up curtain tubular motor, electric block, mechanical block, hoist engine etc. after the motor outage, the load of being connected with the motor output can continue to take place to rotate because of inertia or other external force effects, if do not take braking action, then can drive the motor on the one hand and continue to rotate, can damage the motor, and on the other hand, the continuation motion of load end after the motor outage probably causes the incident.
Therefore, in order to protect the motor and to prevent the load terminal connected to the motor from continuing to operate after the motor terminal is stopped, a reverse braking function is required.
In the prior art, most of the methods are that a brake is connected on or with a motor shaft, braking force is provided through the brake, and braking torque is provided for the motor shaft, so that the motor is prevented from rotating after power failure, and further safety accidents are prevented.
For example, chinese patent application No. 201711485669.4 discloses a motor braking mechanism for a punch press, which includes a frame, which is vertically disposed; the transmission shaft is horizontally arranged on the rack and is eccentrically connected with a connecting rod arranged in the rack; the speed reducer is in transmission connection with the transmission shaft; the motor is fixedly arranged on the frame and is separated from the speed reducer; the brake disc is positioned between the speed reducer and the motor and is in transmission connection with the speed reducer and the motor respectively; a brake secured to the frame and adjacent the brake pad; when the motor is powered off, the control system sends a motor stop instruction to the brake, the brake brakes, the brake disc tightly abuts against the brake disc, and the transmission shaft stops rotating.
The motor braking mechanism has a control command transmission process, so the braking process lags behind the motor stop to a certain extent, the braking cannot be truly realized while the motor stops, the generation of the braking action depends on the command control of a control system, and if the command transmission is delayed, the transmission is wrong or the system fails, the braking is possibly delayed, the braking process cannot be normally carried out, so the motor braking mechanism still has potential safety hazards and insufficient reliability.
For another example, chinese patent application No. 201711319526.6 discloses an electromagnetic brake, set up on rotary mechanism, be used for right rotary mechanism brakies, including actuating mechanism, armature and friction disc, the friction disc can be along with rotary mechanism rotates, armature sets up actuating mechanism with between the friction disc, armature is in actuating mechanism's effect down can with friction disc butt or separation, armature with right during the friction disc butt rotary mechanism brakies, armature with the friction disc face of mutually supporting with actuating mechanism's axis is not perpendicular.
When the motor runs normally, the brake does not work, the friction plate is in a free state in the axial direction of the brake, and the friction coefficient is approximate to 0 at the moment; when the motor is powered off or the position is kept, the brake works, the friction plate is locked in the axial direction of the brake, and at the moment, the friction plate is in contact with the armature and the flat plate to generate friction force, so that the rotating shaft of the motor is locked.
An energized coil is the source of electromagnetic force provided by such an electromagnetic brake. The alternating current generates a harmonic magnetic field, which can cause the braking force to be in sine fluctuation; the direct current generates a stable magnetic field, and the generated braking force is stable. Therefore, in order to ensure the continuous stability of the electromagnetic attraction, the brake is generally operated by using a DC24V power supply. When the motor works, the temperature of the motor rises due to the existence of load and loss; the coil is generally made of copper wire, and R ═ R0(1+ α T) indicates that the resistance R increases due to an increase in temperature T, and when the external connection voltage is constant at 24V, I ═ U/R indicates that the coil current decreases when the resistance R decreases, and the electromagnetic force finally decreases, thereby causing the brake to operate abnormally.
Therefore, the electromagnetic brake also has the defects of reliability and potential safety hazard.
In addition, chinese patent No. CN1091494C discloses a one-way bearing non-return clutch driven disc, and also discloses a one-way bearing composed of balls and springs, which achieves the effect of one-way transmission through the one-way bearing, but unlike the above-mentioned forward transmission and reverse braking, the one-way bearing only allows the input shaft to rotate in one direction to realize power transmission, and when the input shaft rotates in the reverse direction, it cannot realize power transmission to the output shaft, so the structure has narrow applicability in use.
Therefore, the prior art lacks a motor that can provide a reliable and safe transmission, no limitation in the direction of rotation of the input shaft, and a transmission with a reverse braking function.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a roller shutter motor including a reverse braking driver, where the reverse braking driver includes a mounting sleeve, an input shaft, and an output shaft, and a reverse braking assembly is disposed in the mounting sleeve to allow forward power transmission direction and prevent reverse power transmission, and whether forward power transmission is forward or reverse is not limited, that is, the input shaft can transmit power to the output shaft, and the output shaft cannot output power to the input shaft under the action of the reverse braking assembly, so as to protect a power source connected to the input shaft, and the rotation of the input shaft of the reverse braking driver is not limited by direction, so that the application is wide, and in addition, the advantages of rapid braking response and reliable braking effect are provided.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a roller shutter motor comprising a reverse braking driver comprises the reverse braking driver, the reverse braking driver is installed in the motor and comprises an installation sleeve, an input shaft and an output shaft, a cavity is formed in the installation sleeve, the input shaft and the output shaft are both rotatably arranged in the installation sleeve, a rotary disc is fixed on the output shaft, one end of the installation sleeve is closed, a through hole for the output shaft to penetrate out is formed in the end of the installation sleeve, and the peripheral surface of the rotary disc is rotatably matched with the peripheral side wall of the cavity;
the installation sleeve is internally provided with a reverse braking assembly, the reverse braking assembly comprises magnetic rollers, the magnetic rollers are arranged in pairs, and the magnetic rollers are arranged in a plurality of pairs in the circumferential direction of the turntable;
an accommodating groove is formed in the circumferential surface of the turntable corresponding to each magnetic roller, and the openings of the two accommodating grooves formed in the pair of corresponding magnetic rollers face to each other or face to each other;
the accommodating groove comprises an accommodating part and a braking surface connected with the accommodating part;
when the magnetic roller is positioned in the accommodating part, the peripheral surface of the magnetic roller has a clearance with the peripheral side wall of the cavity;
the two magnetic rollers of each pair are magnetically repelled or attracted towards the same end, so that the magnetic rollers of each pair are separated from the accommodating part and are abutted with the braking surface and the circumferential side wall of the cavity, and the normal tangent to the braking surface of the magnetic rollers does not pass through the center of the turntable;
a shifting block is fixed on the input shaft, and each magnetic roller is correspondingly provided with one shifting block;
a movable gap for the shifting block to rotate is kept between the circumferential surface of the turntable and the circumferential inner wall of the cavity, and the movable gap is communicated with the accommodating groove;
the mounting sleeve, the turntable and the shifting block are all made of non-magnetic materials.
Through setting up like this, the input shaft is connected with motor or other rotation power sources, and for power input end, the process that the input shaft exported power to the output shaft is forward power transmission, and in this actuator, the input shaft can forward rotation or reverse rotation, and the output shaft drives output shaft pivoted process and is reverse power transmission, and this actuator can prevent reverse power transmission, and concrete process is: the input shaft has no power input: the two magnetic rollers in the same pair have magnetic repulsion or magnetic attraction, so that the magnetic rollers are separated from the accommodating parts of the accommodating grooves and are abutted against the circumferential side wall and the braking surface of the cavity;
in the forward power transmission:
when the input shaft rotates along any direction of the forward direction or the reverse direction under the driving of the power source, the opening faces into the accommodating groove opposite to the rotating direction of the input shaft: the poking blocks arranged on the input shaft in pairs corresponding to the magnetic rollers move into the accommodating groove from the movable gap, the poking blocks apply thrust to the magnetic rollers along the rotating direction of the input shaft, so that the magnetic rollers overcome magnetic force, are separated from the braking surface and are tightly abutted with the accommodating part of the accommodating groove, and when the magnetic rollers are positioned in the accommodating part, the magnetic rollers are spaced from the circumferential side wall, so that the pair of magnetic rollers only contact with the circumferential side wall of the cavity without applying opposite acting force or being separated from the circumferential side wall of the cavity, and the pair of magnetic rollers can apply rotary driving force to the rotary disc under the pushing of the poking blocks;
the opening faces to the accommodating groove along the rotation direction of the input shaft, and under the action of the magnetic force of the other magnetic roller of the same pair, the magnetic roller in the accommodating groove is also separated from the accommodating part and is abutted against the braking surface and the circumferential side surface of the cavity, so that the force applied to the pair of magnetic rollers is along the rotation direction of the input shaft, and the accommodating part in the accommodating groove which rotates forwards along the rotation direction of the input shaft can push the magnetic roller to move forwards due to the rotation driving force applied to the rotating disc, and finally, the input shaft drives the rotating disc to rotate through the magnetic roller abutted against the shifting block, so that the output shaft is driven to rotate, and the power of the input shaft is transmitted to the output shaft in the forward direction;
however, when the input shaft stops the power input:
even if the output shaft still has torque generated by rotation inertia or load, namely the rotary table is subjected to reverse rotation torque applied by the output shaft end, in a containing groove with an opening facing to the opposite direction of the reverse rotation torque, the magnetic roller in the containing groove is in contact with the braking surface and the circumferential side wall of the cavity, so that the rotary table applies pressure to the magnetic roller through the braking surface, and the magnetic roller applies pressure to the circumferential side wall of the cavity, the magnetic roller is subjected to the reaction force applied by the circumferential side wall of the cavity, and the magnetic force applied by the other magnetic roller of the same pair to make the magnetic roller separate from the containing part makes the magnetic roller in the containing groove with the opening facing to the opposite direction of the reverse rotation torque have the tendency of moving opposite direction to the rotary table, and the reaction force generated by the magnetic roller to the braking surface does not pass through the center of the rotary table and forms the braking torque opposite direction to the reverse rotation torque, make the reverse rotation process of carousel obstructed, reach the purpose of reverse braking, because the circumference lateral wall that magnetism roller and braking face, cavity keep the butt when the output shaft produced the reverse rotation moment of torsion to make the reverse braking process reaction quick, and because its reverse braking force is produced by pure mechanical structure, the reliability is high.
Preferably, the side surface of the rotating disc is in contact with the inner wall of the cavity close to one end of the through hole and can rotate relatively.
Preferably, the input shaft and the output shaft are made of a non-magnetic material.
Preferably, the openings of the two accommodating grooves opened in the pair of magnetic rollers are opposite to each other, and the two magnetic rollers in each pair magnetically repel each other toward the same end.
Through the arrangement, the opening orientations of the two accommodating grooves formed corresponding to the pair of magnetic rollers are in a back-to-back state, and at the moment, in order to ensure that the magnetic rollers positioned in the respective accommodating grooves are separated from the accommodating parts of the respective accommodating grooves and are abutted against the braking surface and the circumferential side wall of the cavity, the magnetic poles of the adjacent ends of the different pairs of magnetic rollers in the same orientation are required to be the same, so that a magnetic repulsion force is generated between the two magnetic rollers.
Preferably, in the two magnetic rollers of the same pair, an included angle α is formed between the two magnetic rollers and a connecting line of the centers of the circles of the rotating discs, and the angle α is defined as: 0 ° < α <90 °.
Through the arrangement, the magnetic rollers can be ensured to be reliably abutted against the braking surface and the circumferential side wall of the cavity by the mutual repulsion action effect generated by the two magnetic rollers.
Preferably, the openings of the two accommodating grooves opened in the pair of magnetic rollers face each other, and the two magnetic rollers in each pair magnetically attract each other toward the same end.
With this arrangement, as a variation, the openings of the two receiving grooves corresponding to the same pair of magnetic rollers may be set to be in an opposite state, and in order to ensure that the magnetic rollers located in the respective receiving grooves are disengaged from the receiving portions of the respective receiving grooves and abut against the braking surface and the circumferential side wall of the cavity, the magnetic poles of the same-oriented ends of the adjacent different pairs of magnetic rollers are required to be opposite, so that a magnetic attraction force is generated between the two magnetic rollers.
Preferably, in the two magnetic rollers of the same pair, an included angle α is formed between the two magnetic rollers and a connecting line of the centers of the circles of the rotating discs, and the angle α is defined as: 0 ° < α <90 °.
Through the arrangement, the magnetic rollers can be ensured to be reliably abutted against the braking surface and the circumferential side wall of the cavity by the mutual attraction effect generated by the two magnetic rollers.
Preferably, be fixed with a connection pad on the input shaft, the shifting block is fixed in on the connection pad, the installation cover deviates from the one end detachably of through-hole is connected with the apron, be equipped with the confession on the apron the logical groove that the input shaft was worn out, one side of connection pad with the carousel rotationally cooperates, the opposite side with the apron rotationally cooperates, the connection pad global with the circumference lateral wall of cavity rotationally cooperates.
Through setting up like this, be fixed in the connection pad with the shifting block on, and the input shaft drives the shifting block and rotates, and then drives the carousel through the shifting block through the magnetism roller and realize the transmission, is favorable to guaranteeing driven stability and reliability.
Preferably, a rotating column is arranged in the center of the connecting disc, a groove for the rotating column to connect is formed in one surface, facing the input shaft, of the rotating disc, and the rotating column is rotatably matched with the groove.
Through setting up like this, the rotation post rotationally cooperates with the recess to make the area of contact of connection pad and carousel reduce, reduce because the wearing and tearing that mutual rotational friction produced, still be favorable to the noise abatement and produce.
Preferably, when the magnetic roller is located in the accommodating part, the gap between the peripheral surface of the magnetic roller and the peripheral side wall of the cavity is b, and 0< b is less than or equal to 0.3 mm.
With this arrangement, when the magnetic roller is in the housing, b is defined as: b is more than 0 and less than or equal to 0.3mm, so that the mutual friction between the magnetic roller and the inner wall of the cavity can be reduced, the abrasion of the magnetic roller is reduced, the friction resistance in the forward power transmission process of the input shaft is favorably reduced, and the energy loss is reduced.
Based on the same invention concept, the invention provides another roller shutter motor comprising a reverse braking driver, wherein the motor comprises the reverse braking driver, the reverse braking driver is arranged in the motor, the reverse braking driver comprises an installation sleeve, a magnetic damping disc, an input shaft and an output shaft, the installation sleeve is internally provided with a cavity, the magnetic damping disc is fixed in the installation sleeve, the input shaft and the output shaft are both rotatably arranged in the installation sleeve, and the magnetic damping disc is made of magnetic materials;
a rotary disc is fixed on the output shaft, one end of the mounting sleeve is closed, a through hole for the output shaft to penetrate through is formed in the end of the mounting sleeve, the circumferential surface of the rotary disc is rotatably matched with the circumferential side wall of the cavity, and the magnetic damping disc is fixed on the inner wall, close to the through hole, of the cavity;
the installation sleeve is internally provided with a reverse braking assembly, the reverse braking assembly comprises magnetic rollers, the magnetic rollers are arranged in pairs, and the magnetic rollers are arranged in a plurality of pairs in the circumferential direction of the turntable;
the magnetic rolling pieces are adsorbed on the surface of the magnetic damping disc;
an accommodating groove is formed in the circumferential surface of the turntable corresponding to each magnetic rolling element, and the openings of the two accommodating grooves formed in the pair of corresponding magnetic rollers face to each other or face to each other;
the accommodating groove comprises an accommodating part and a braking surface connected with the accommodating part;
when the magnetic rolling piece is positioned in the accommodating part, a gap is reserved between the peripheral surface of the magnetic rolling piece and the peripheral side wall of the cavity;
when the magnetic rolling piece is positioned on the braking surface, the magnetic rolling piece is abutted against the circumferential side wall of the cavity, and the normal of the magnetic roller tangent to the braking surface does not pass through the center of the turntable;
a shifting block is fixed on the input shaft, and each magnetic rolling piece is correspondingly provided with one shifting block;
a movable gap for the shifting block to rotate is kept between the circumferential surface of the turntable and the circumferential inner wall of the cavity, and the movable gap is communicated with the accommodating groove;
the mounting sleeve, the turntable and the shifting block are all made of non-magnetic materials.
Through setting up like this, in this scheme, through increasing magnetism damping disk, through magnetism rolling member and magnetism damping disk mutual adsorption, rely on magnetism damping disk to replace the magnetic force that produces between two magnetic rollers of the same pair of the aforesaid scheme to the magnetism adsorption resistance that magnetism rolling member provided, its forward power transmission's principle is similar with the aforesaid scheme, and the difference lies in: in the accommodating groove with the opening facing to the direction opposite to the rotating direction of the input shaft, the shifting block overcomes the adsorption resistance between the magnetic rolling piece and the magnetic damping disc, the magnetic rolling piece is pushed back into the accommodating groove to be contacted with the accommodating part, and then the rotating disc is driven to rotate, and in the accommodating groove with the opening facing to the direction same as the rotating direction of the input shaft, because the magnetic rolling piece and the magnetic damping disc do not move mutually under the normal state, after the rotating disc rotates, the accommodating part of the accommodating groove is abutted to the rolling piece, the adsorption resistance between the magnetic rolling piece and the magnetic damping disc is overcome and the magnetic damping disc is driven to rotate, finally, the power provided by the input shaft is achieved, and the output shaft is driven to rotate through the power transmission of the shifting block and the magnetic rolling piece, so that the forward power transmission is completed;
in the process of reverse braking, because the magnetic rolling elements and the magnetic damping disc are mutually adsorbed and fixed, when an output shaft has reverse rotation torque, the rotating disc rotates in a certain degree of small angle under the action of the reverse rotation torque, so that the magnetic rolling elements in the accommodating groove with the opening opposite to the reverse rotation torque are separated from the accommodating part of the accommodating groove and are abutted against the braking surface and the circumferential side wall of the cavity, the rotation size of the angle is related to the size of a gap between the magnetic rolling elements after being placed in the accommodating part and the circumferential side wall of the cavity, the smaller the gap is, the output shaft is subjected to the reverse rotation torque to rotate the rotating disc until the magnetic rolling elements are separated from the accommodating part of the accommodating groove and are abutted against the braking surface and the circumferential side wall of the cavity, and after the magnetic rolling elements are abutted against the braking surface and the circumferential side wall of the cavity, the acting force generated by the magnetic rolling elements on the rotating disc generates braking torque, the effect of stopping reverse power transmission is achieved;
compared with the scheme, the scheme has the advantages that: the magnetism of the magnetic rolling piece does not need to be specially arranged, the installation is convenient, and the magnetic adsorption effect between the magnetic rolling piece and the magnetic damping sheet disc is obvious, so that the noise generated in the transmission process is favorably reduced.
Preferably, the side surface of the rotating disc is in contact with the inner wall of the cavity close to one end of the through hole and can rotate relatively.
Preferably, the input shaft and the output shaft are made of a non-magnetic material.
Preferably, the magnetic rolling member is a magnetic ball or a magnetic column.
By this arrangement the magnetic rolling elements have no requirement for a polarity specific arrangement, and therefore a more flexible choice of structure, in particular a magnetic ball or a magnetic column, is possible.
Preferably, a connecting disc is fixed on the input shaft, the shifting block is fixed on the connecting disc, one end of the mounting sleeve, which is far away from the through hole, is detachably connected with a cover plate, a through groove for the input shaft to penetrate through is formed in the cover plate, one side of the connecting disc is rotatably matched with the rotating disc, the other side of the connecting disc is rotatably matched with the cover plate, and the peripheral surface of the connecting disc is rotatably matched with the circumferential side wall of the cavity;
the rotary table is characterized in that a rotary column is arranged in the center of the connecting disc, a groove for the rotary column to connect is formed in one surface of the rotary table facing the input shaft, and the rotary column is rotationally matched with the groove.
Through setting up like this, similar with the effect of aforementioned scheme, be favorable to guaranteeing driven stability and reliability, reduce because the wearing and tearing that rotate friction each other and produce, still be favorable to the noise abatement and produce.
Preferably, when the magnetic rolling member is located in the accommodating part, a gap between the circumferential surface of the magnetic rolling member and the circumferential side wall of the cavity is b, and 0< b is less than or equal to 0.3 mm.
Through the arrangement, similar to the effect of the scheme, the mutual friction between the magnetic roller and the inner wall of the cavity can be reduced, so that the abrasion of the magnetic roller is reduced, the friction resistance applied to the input shaft in the forward power transmission process is favorably reduced, and the energy loss is reduced
Compared with the prior art, the invention has the beneficial technical effects that:
1. the utility model provides a roll up curtain motor including reverse braking's driver, reverse braking's driver adopts mechanical structure to reach reverse braking effect through set up reverse braking subassembly in the installation cover, and the input shaft can forward or reverse rotation, and its rotation direction is unrestricted, and extensive applicability to can stop under the condition of detent input at the input, if the output still has reverse rotation moment of torsion, reverse braking subassembly can play effectual braking effect, and its braking action is rapid, reliable.
2. The invention provides two rolling curtain motors comprising reverse braking drivers based on the same inventive concept, wherein one scheme is not provided with a magnetic damping disc, and the other scheme is provided with a magnetic damping disc, and the magnetic damping disc has the advantages of convenience in installation and low noise.
Drawings
FIG. 1 is an exploded view of the overall construction of a reverse braking actuator according to one embodiment of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of a reverse braking actuator according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of the structure of a magnetic roller in one embodiment of the present invention;
FIG. 4 is a schematic transverse cross-sectional view of a reverse braking actuator according to one embodiment of the present invention;
FIG. 5 is a schematic transverse cross-sectional view of a reverse braking actuator in accordance with another embodiment of the invention;
FIG. 6 is a schematic representation of a reverse braking actuator in one embodiment of the present invention with no power applied to the input shaft;
FIG. 7 is a schematic representation of a reverse braking transmission according to one embodiment of the present invention in a state where power is applied to the input shaft;
FIG. 8 is a schematic illustration of the reverse braking principle of a reverse braking actuator according to one embodiment of the present invention;
FIG. 9 is an enlarged view of portion A of FIG. 8;
FIG. 10 is a schematic transverse sectional view of a reverse braking actuator in embodiment 2 of the invention;
FIG. 11 is an exploded view showing the overall structure of a reverse braking actuator in embodiment 3 of the present invention;
FIG. 12 is a schematic longitudinal sectional view of a reverse braking actuator in embodiment 3 of the invention;
FIG. 13 is a schematic view showing a reverse braking transmission in accordance with embodiment 3 of the present invention in a state where power is applied to an input shaft;
fig. 14 is a schematic view of the reverse braking principle of the reverse braking actuator in embodiment 3 of the invention;
fig. 15 is an enlarged view of a portion B in fig. 14.
Wherein, the technical characteristics that each reference numeral refers to are as follows:
1. installing a sleeve; 101. a cavity; 2. an input shaft; 201. shifting blocks; 202. a long poking strip; 2021. terminal I; 2022. terminal I'; 2023. end J; 2024. end J'; 203. a connecting disc; 2031. rotating the column; 204. connecting grooves; 3. an output shaft; 301. a turntable; 3011. accommodating grooves; 30111. an accommodating portion; 30112. a braking surface; 3012. a groove M; 3013. a slot M'; 3014. a groove N; 3015. a groove N'; 3016. a clearance for movement; 3017. a groove; 4. a reverse braking assembly; 401. a magnetic roller; 4011. a roller X; 4012. a roller X'; 4013. a roller Y; 4014. a roller Y'; 5. a cover plate; 501. an installation part; 6. a magnetic damping disc; 7. a magnetic rolling member; 701. a rolling member S; 702. a rolling member S'; 703. a rolling member T; 704. a rolling member T'.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.
Example 1
The present embodiment discloses a roller blind motor including a reverse braking actuator mounted within the motor. Referring to fig. 1 and 2, the driver of the reverse braking includes a mounting sleeve 1, an input shaft 2 and an output shaft 3, a cavity 101 is arranged inside the mounting sleeve 1, the input shaft 2 and the output shaft 3 are both rotatably arranged in the mounting sleeve 1, a rotary disc 301 is fixed on the output shaft 3, the rotary disc 301 and the output shaft 3 are integrally formed, one end of the mounting sleeve 1 is closed and is provided with a through hole (not labeled in the figure) for the output shaft 3 to penetrate out, and the circumferential surface of the rotary disc 301 is rotatably matched with the circumferential side wall of the cavity 101.
Preferably, the side surface of the rotary disc 301 is contacted with the inner wall of the cavity 101 at one end close to the through hole and can rotate relatively;
in other embodiments, a non-magnetic ball may be disposed between the side surface of the turntable 301 and the inner wall of the cavity 101 near the through hole to reduce contact friction.
The reverse braking assembly 4 is arranged in the mounting sleeve 1, the reverse braking assembly 4 comprises magnetic rollers 401, the magnetic rollers 401 are arranged in pairs, the magnetic rollers 401 are arranged in a plurality of pairs in the circumferential direction of the turntable 301, as shown in fig. 4-8, in the embodiment, the magnetic rollers 401 are arranged in two pairs in the circumferential direction of the turntable 301 and are symmetrically arranged about the center of the turntable 301.
In other embodiments, the magnetic rollers 401 may be arranged in more than 3 pairs uniformly or non-uniformly along the circumferential direction of the turntable 301.
In this embodiment, the magnetic roller 401 is a magnetic column; the magnetic pole can adopt the existing magnetic material, such as Ru Fe B permanent magnet material.
Referring to fig. 3, the magnetic pole has a cylindrical shape (a) or a convex shape or a concave shape (c).
4-8, for ease of description, the two pairs of magnetic rollers 401 in the present embodiment are respectively identified as a first roller pair (not labeled) and a second roller pair (not labeled), where roller X4011 and roller Y4013 are the first roller pair and roller X '4012 and roller Y'4014 are the second roller pair.
An accommodating groove 3011 is formed on the circumferential surface of the turntable 301 corresponding to each magnetic roller 401, in this embodiment, two accommodating grooves 3011 corresponding to the first roller pair are respectively marked as a groove M3012 and a groove N3014, where the groove M3012 is formed for a corresponding roller X4011, and the groove N3014 is formed for a corresponding roller Y4013; the two receiving slots 3011 corresponding to the second roller pair are respectively marked as a slot M '3013 and a slot N'3015, where the slot M '3013 is opened for the corresponding roller X'4012, and the slot N '3015 is opened for the corresponding roller Y' 4014.
Each receiving slot 3011 includes a receiving portion 30111 and a braking surface 30112 connected to the receiving portion 30111, in this embodiment, the receiving portion 30111 is an arc-shaped surface with a radius equal to the circular cross-section radius of the magnetic roller 401, and in other embodiments, a V-shaped surface may be used instead.
Referring to fig. 4 and 6, the braking face 30112 is a plane, and the angle at which the braking face 30112 is disposed satisfies: when the magnetic roller 401 is in contact with both the braking surface 30112 and the circumferential inner wall of the cavity 101, that is, when the circular cross section of the magnetic roller 401 is tangent to both the braking surface 30112 and the circumferential inner wall of the cavity 101, the normal of the tangent point of the magnetic roller 401 and the braking surface 30112 does not pass through the center of the turntable 301, as indicated by P in the figure;
further, in this embodiment, the slot M3012 and the slot N3014 are symmetrically arranged, the slot M '3013 and the slot N'3015 are symmetrically arranged, and when a symmetry line of the slot M3012 and the slot N3014 is horizontal, an included angle between the braking surface 30112 and a horizontal plane is β, 90 ° < β <105 °, and β is 95 °.
When the magnetic roller 401 is located in the accommodating portion 30111, the circumferential surface of the magnetic roller 401 has a gap from the circumferential side wall of the cavity 101;
in the embodiment, when the magnetic roller 401 is located in the accommodating part 30111, the gap between the circumferential surface of the magnetic roller 401 and the circumferential side wall of the cavity 101 is b, and 0< b is less than or equal to 0.3 mm.
Referring to fig. 5, when the magnetic rollers 401 are located in the accommodating portion 30111, the centers of two magnetic rollers 401 of the same pair in the same group form an angle α with the line connecting the centers of the circle of the turntable 301, where α is 0 ° < α <90 °, and in this embodiment, α is 30 °.
The openings of the two accommodating grooves 3011 corresponding to the same pair of magnetic rollers 401 may be set to be in a back-to-back state or a facing state;
the two magnetic rollers 401 of the same pair are magnetically repelled or magnetically attracted towards the same end, so that the magnetic rollers 401 both have a circumferential side wall which moves towards the opening of the accommodating slot 3011, is separated from the accommodating part 30111 and tightly abuts against the braking surface 30112 and the cavity 101;
referring to fig. 6, in this embodiment, the openings of the two receiving slots 3011 corresponding to the same pair of magnetic rollers 401 are opposite, that is, the slot M3012 is opposite to the opening of the slot N3014, and correspondingly, the polarity of one end of the roller X4011 facing the paper surface is the same as the polarity of one end of the roller Y4013 facing the paper surface, so that mutually repulsive magnetic forces Fc and Fc' are generated between the roller X4011 and the roller Y4013,
under the action of Fc, Fc', both rollers X4011 and Y4013 abut braking surface 30112 and the circumferential side wall of cavity 101.
Similarly, the polarity of one end of the roller X '4012 in the paper surface direction is the same as the polarity of one end of the roller Y'4014 in the paper surface direction, and the repulsive force generated by the two is not shown.
Referring to fig. 4, a dial 201 is fixed on the input shaft 2, and each magnetic roller 401 corresponds to one dial 201;
in this embodiment, referring to fig. 5 to 7, the dial 201 is integrally formed with the input shaft 2 to form a long dial bar 202, wherein one end of one long dial bar is denoted as an end I2021, the other end is denoted as an end J2023, one end of the other long dial bar 202 is denoted as an end I '2022, the other end is denoted as an end J'2024, the end I2021 and the end J2023 correspond to a first roller pair, and the end I '2022 and the end J'2024 correspond to a second roller pair, more specifically, the end I2021 and the end J2023 respectively depend on the roller X4011 and the roller Y4013, and the end I '2022 and the end J'2024 respectively depend on the roller X '4012 and the roller Y' 4014.
A movable gap 3016 for the rotation of the shifting block 201 is kept between the circumferential surface of the turntable 301 and the circumferential inner wall of the cavity 101, the movable gap 3016 is communicated with the accommodating groove 3011, and the shifting block 201 can freely enter and exit the accommodating groove 3011;
it should be noted that the gap between the magnetic roller 401 and the dial 201 is shown to be large, and in actual implementation, only the assembly gap needs to be reserved.
When the input shaft 2 rotates in a certain direction, the shifting block 201 can enter the accommodating groove 3011 corresponding to the magnetic roller 401, and the magnetic roller 401 is tightly abutted to the accommodating part 30111, so that the magnetic roller 401 is separated from the circumferential side wall of the cavity 101;
the mounting sleeve 1, the turntable 301 and the shifting block 201 are all made of nonmagnetic materials; the non-magnetic material is copper, aluminum, titanium and alloy thereof and austenitic stainless steel.
As a preferred embodiment, the input shaft 2 and the output shaft 3 are also made of any of the nonmagnetic materials described above.
In this embodiment, the mounting sleeve 1, the input shaft 2, the output shaft 3, the turntable 301, and the shifting block 201 are all made of aluminum or aluminum alloy.
Referring to fig. 1 and 2, a connecting disc 203 is fixed on the input shaft 2, the shifting block 201 is fixed on the connecting disc 203, one end of the mounting sleeve 1 departing from the through hole is detachably connected with a cover plate 5, a through groove for the input shaft 2 to penetrate out is formed in the cover plate 5, one side of the connecting disc 203 is in running fit with the rotary disc 301, the other side of the connecting disc 203 is in running fit with the cover plate 5, and the peripheral surface of the connecting disc 203 is rotationally matched with the circumferential side wall of the cavity 101.
The center of the connecting disc 203 is provided with a rotating column 2031, one surface of the turntable 301 facing the input shaft 2 is provided with a groove 3017 for the connecting of the rotating column 2031, and the rotating column 2031 is rotatably matched with the groove 3017.
The cover plate 5 may further include an installation portion 501, the input shaft 2 may further include a connection groove 204 (not labeled in the figure), the installation portion 501 may be used for fixing and installing a power source for rotation, such as a motor and a rotary cylinder, and the connection groove 204 may be used for connection of the power source for rotation.
The implementation process and principle of the embodiment 1 of the invention are as follows:
referring to fig. 4 or 6, the input shaft 2 has no power input: magnetic repulsion occurs between the two magnetic rollers 401 of the same pair, such as repulsive forces Fc, Fc' generated between the roller X4011 and the roller Y4013, so that the magnetic rollers 401 are disengaged from the receiving portions 30111 of the respective receiving grooves 3011 and come into contact with the circumferential side walls of the cavity 101 and the braking surfaces 30112;
during forward power transmission, the input shaft 2 can rotate in either forward or reverse direction under the driving of the power source, and the forward and reverse working principles are the same, so that only one of the directions is taken as an example, as shown in fig. 7, the output shaft 3 rotates counterclockwise under the action of the torque M0, so as to drive the long shifting block 2021 to rotate counterclockwise, and the opening faces to the accommodating groove 3011 opposite to the rotation direction of the input shaft 2, namely, the groove N3014, the groove N' 3015: the long shifting block 2021 on the input shaft 2 moves from the movable gap 3016 to the accommodating groove 3011, the end J2023 and the end J '2024 respectively apply thrust forces F0 and F0' to the roller Y4013 and the roller Y '4014 along the direction of rotation of the input shaft 2, so that the magnetic roller 401 overcomes the magnetic force, for example, the roller Y4013 overcomes Fc', disengages from the braking surface 30112 and keeps close contact with the accommodating part 30111 of the accommodating groove 3011, and when the magnetic roller 401 is located in the accommodating part 30111, the magnetic roller 401 has a gap with the circumferential side wall, so that the magnetic roller 401 only contacts with the circumferential side wall of the cavity 101 and does not apply opposite force to each other or disengage from the circumferential side wall of the cavity 101, and the magnetic roller 401 can apply a rotational driving force to the turntable 301 under the pushing of the shifting block 201;
the opening is directed into the receiving groove 3011 in the rotation direction of the input shaft 2, i.e., the groove M3012, the groove M' 3013: due to the magnetic force of the same pair of magnetic rollers 401, for example, the roller X4011 is subjected to Fc, the magnetic roller 401 in the accommodating groove 3011 is also separated from the accommodating portion 30111 and abuts against the braking surface 30112 and the circumferential side surface of the cavity 101, so that Fc is along the rotation direction of the input shaft 2, and the turntable 301 is subjected to the rotational driving force, the accommodating portion 30111 in the groove M3012 can push the roller X4011 to move forward, that is, the ball X is pushed by Fx, the ball X 'is pushed by Fx', and finally, the input shaft 2 drives the turntable 301 to rotate through the magnetic roller 401 abutting against the shifting block 201, so as to drive the output shaft 3 to rotate, so that the power of the input shaft 2 is positively transmitted to the output shaft 3;
however, referring to fig. 8 to 9, when the input shaft 2 stops the power input, even if the output shaft 3 still has a torque M1 due to the rotational inertia or the load, that is, the dial 301 receives the reverse rotational torque applied from the end of the output shaft 3, the roller X4011 is held in abutment with the braking surface 30112 and the circumferential side wall of the cavity 101 by the Fc action in the accommodation groove 3011, that is, the groove M3012 and the groove M'3013, for example, the groove M3012, which is opened to the opposite direction to the reverse rotational torque, so that the dial 301 applies a pressure to the roller X4011 via the braking surface 30112Force F2And roller X4011 exerts a pressure F on the circumferential side wall of cavity 1011Then the roller X4011 is subjected to a reaction force F exerted by the cavity 1011', adding Fc, according to the force synthesis principle, F1' and F2Resultant force of F3，F3The resultant force with Fc is F4As shown in the figure, F4In a direction opposite to the direction of the counter-rotating torque, causing the roller X4011 to have a tendency to move in the opposite direction to the turntable 301;
and the reaction force F generated by roller X4011 against braking face 301122' do not pass through the center of the turntable 301 and generate a braking torque M opposite to the reverse rotation torque directionXThe braking torques generated by the pair of magnetic rollers 401 are superimposed on each other, i.e. the braking torque M applied by the roller X'4012 to the turntable 301X' and MXAnd the superposition hinders the reverse rotation process of the turntable 301, so that the purpose of reverse braking is achieved.
And because the magnetic roller 401 is kept in contact with the braking surface 30112 and the circumferential side wall of the cavity 101 when the output shaft 3 generates reverse rotation torque, the reverse braking process is quick in response, and because the reverse braking force is generated by a pure mechanical structure, the reliability is high.
Example 2
This embodiment discloses another roller shade motor including a reverse braking actuator mounted within the motor. Referring to fig. 10, the reverse braking actuator differs from embodiment 1 in that:
the openings of the two accommodating grooves 3011 corresponding to the same pair of magnetic rollers 401 are in a reverse state, and correspondingly, the magnetic rollers 401 of the same pair are opposite in magnetism towards the same end and attract each other;
when the magnetic rollers 401 are located in the accommodating portions, the centers of two magnetic rollers 401 of the same pair in the same group form an included angle α with a line connecting the centers of the circle of the turntable 301, and the included angle α is 0 ° < α <90 °.
The implementation process of embodiment 2 of the present invention is similar to that of embodiment 1, and is not described herein again.
Example 3
This embodiment discloses another roller shade motor including a reverse braking actuator mounted within the motor. Referring to fig. 11 to 15, the reverse braking actuator differs from embodiment 1 in that:
in this embodiment, the reverse braking actuator further includes a magnetic damping disc 6, and the magnetic damping disc 6 is made of a magnetic material, such as iron;
the magnetic damping disc 6 is fixed on the inner wall of the cavity 101 close to the through hole, and the side surface of the rotary disc 301 is in contact with the surface of the magnetic damping disc 6 and can rotate relatively;
the reverse braking component 4 comprises magnetic rolling parts 7 which are arranged in pairs;
the magnetic rolling element 7 is a magnetic ball or a magnetic column, the material of the magnetic column or the magnetic ball is the same as that of embodiment 1, and further, referring to fig. 3, the magnetic column has the same structure as that of the magnetic roller 401 in embodiment 1, and may be a cylindrical shape (a) or a convex shape or a concave shape (c).
In this embodiment, the magnetic rollers 7 are cylindrical magnetic columns, and the magnetic rollers 401 are provided in pairs in the circumferential direction of the turntable 301, and in this embodiment, the magnetic rollers 401 are provided in two pairs in the circumferential direction of the turntable 301 and are symmetrically provided about the center of the turntable 301.
In other embodiments, the magnetic rollers 401 may be arranged in more than 3 pairs uniformly or non-uniformly along the circumferential direction of the turntable 301.
The magnetic rolling members 7 are adsorbed on the surface of the magnetic damping disk 6, and the magnetic force of the magnetic rolling members 7 and the magnetic damping disk 6 is related to the magnetic strength of the magnetic rolling members 7 and can be designed or selected according to requirements;
for example, in the present embodiment, two pairs of magnetic rollers 7 are provided, which are respectively referred to as a first roller pair including the roller S701 and the roller T703, and a second roller pair including the roller S '702 and the roller T' 704.
An accommodating groove 3011 is formed on the circumferential surface of the turntable 301 corresponding to each magnetic rolling element 7, in this embodiment, two accommodating grooves 3011 corresponding to the first rolling element pair are respectively recorded as a groove M3012 and a groove N3014, and two accommodating grooves 3011 corresponding to the second rolling element pair are respectively recorded as a groove M '3013 and a groove N' 3015.
In this embodiment, the magnetic rolling element 7 is equivalent to the magnetic roller 401 in embodiment 1 or embodiment 2, and thus the structure of the accommodating groove 3011 and the arrangement relationship between the magnetic rolling element 7 and the accommodating groove 3011 in this embodiment are the same as those of the magnetic roller 401 and the accommodating groove 3011 in embodiment 1 or embodiment 2, and therefore, the above description is omitted except for the differences.
The implementation process and principle of embodiment 3 of the invention are as follows: based on example 1, and differs from example 1 in that:
under normal state, the magnetic rolling piece 7 and the magnetic damping disc do not move mutually;
referring to fig. 13, during the forward power transmission, in the accommodating groove 3011 with the opening facing the direction opposite to the rotation direction of the input shaft 2, i.e. the groove N3014 and the groove N '3015, for example, the dial 201 rotates with the input shaft 2, the end J2023 applies a pushing force F0 to the rolling element T703, and the end J '2024 applies a pushing force F0' to the rolling element T '704, so that the rolling element T703 and the rolling element T '704 overcome the respective adsorption resistance with the magnetic damping disk, thereby pushing the magnetic rolling element 7 back into the accommodating groove 3011 and making it contact with the accommodating portion 30111, and further driving the rotary plate 301 to rotate;
in the accommodating groove 3011 with the opening facing the same direction as the rotation direction of the input shaft 2, that is, in the groove M3012 and the groove M '3013, for example, in the groove M3012, because the rolling member S701 and the magnetic damping disc do not move mutually in a normal state, after the rotating disc rotates, the accommodating part 30111 of the groove M3012 abuts against the rolling member S701, the turntable 301 applies a thrust Fx to the rolling member S701, and the turntable 301 applies a thrust Fx' to the rolling member S '702, so that the rolling member S701 and the rolling member S'702 both overcome the respective adsorption resistance with the magnetic damping disc, and further drive the rolling member S701 to rotate, and finally achieve the purpose that the input shaft 2 provides power, and the output shaft 3 is driven to rotate through the power transmission of the dial 201 and the magnetic rolling member 7, thereby completing the forward power transmission;
referring to fig. 14 and 15, during the reverse braking, since the magnetic rolling elements 7 and the magnetic damping disk are fixed to each other by attraction, the output shaft 3 has a reverse rotation torque M1, the turntable 301 rotates at a certain angle under the action of the reverse rotation torque, so that the magnetic rolling elements 7 in the accommodating grooves 3011 with openings opposite to the reverse rotation torque are separated from the accommodating portions 30111 of the accommodating grooves 3011, that is, the rolling elements S701 are separated from the grooves M3012, and the rolling elements S '702 are separated from the grooves M'3013 and respectively abut against the braking surfaces 30112 of the accommodating grooves 3011 and the circumferential side walls of the cavity 101.
The rotation of the angle is related to the size of the gap between the magnetic rolling element 7 and the circumferential side wall of the cavity 101 after being placed in the accommodating part 30111, the smaller the gap is, the smaller the required angle for the output shaft to rotate by the reverse rotation torque until the magnetic rolling element is separated from the accommodating part of the accommodating groove and is abutted with the braking surface and the circumferential side wall of the cavity is, ideally, if the rolling element is just contacted with the circumferential side wall of the cavity 101 without interaction force, the rotating disc 301 does not need to rotate under the action of the reverse rotation torque, and the rolling element is directly separated from the accommodating part 30111 and is abutted with the braking surface 30112; after the magnetic rolling members 7 abut against the braking surface 30112 and the circumferential side wall of the cavity 101, the braking principle is the same as that of embodiment 1 or embodiment 2, and referring to fig. 15, the turntable 301 applies a pressure F to the rolling members S701 through the braking surface 301122And the rolling member S701 applies a pressing force F to the circumferential side wall of the cavity 1011The rolling member S701 is subjected to a reaction force F exerted by the cavity 1011', the magnetic attraction resistance Fz generated between the rolling member S701 and the magnetic damping disk is added, according to the force composition principle, F1' and F2Resultant force of F3Fz is greater than or equal to F3，F3Resultant force with Fz is F4As shown in the figure, F4In a direction opposite to the direction of the counter-rotating torque, so that the rolling member S701 has a tendency to move in the opposite direction to the turntable 301, while the reaction force F generated by the rolling member S701 against the braking surface 301122' do not pass through the center of the turntable 301 and generate a braking torque M opposite to the reverse rotation torque directionSThe braking torques generated by the pair of magnetic rollers 401 are superimposed on each other, i.e. the braking torque M exerted by the rolling member S'702 on the turntable 301S' and MSAre superposed so that the turntableThe reverse rotation process of the brake pedal 301 is blocked, and the purpose of reverse braking is achieved.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A motor for a roller shutter comprises a driver for reverse braking, wherein the driver for reverse braking is installed in the motor, and the motor is characterized in that the driver for reverse braking comprises an installation sleeve (1) with a cavity (101) arranged inside, an input shaft (2) and an output shaft (3) which are both rotatably arranged in the installation sleeve (1), a turntable (301) is fixed on the output shaft (3), one end of the installation sleeve (1) is closed, a through hole for the output shaft (3) to penetrate out is formed in the end of the installation sleeve, and the peripheral surface of the turntable (301) is rotatably matched with the circumferential side wall of the cavity (101);
a reverse braking assembly (4) is arranged in the mounting sleeve (1), the reverse braking assembly (4) comprises magnetic rollers (401), every two of the magnetic rollers (401) are arranged in pairs, and a plurality of pairs of the magnetic rollers (401) are arranged in the circumferential direction of the turntable (301);
an accommodating groove (3011) is formed in the circumferential surface of the turntable (301) corresponding to each magnetic roller (401), and the openings of the two accommodating grooves (3011) formed in the corresponding pair of magnetic rollers (401) face to each other or face to each other;
the accommodating groove (3011) comprises an accommodating part (30111) and a braking surface (30112) connected with the accommodating part (30111);
when the magnetic rollers (401) are positioned in the accommodating part (30111), the peripheral surface of the magnetic rollers (401) has a clearance with the peripheral side wall of the cavity (101), the two magnetic rollers (401) of each pair face the same end and are magnetically repelled or attracted, so that the magnetic rollers (401) of each pair are separated from the accommodating part (30111) and are abutted with the braking surface (30112) and the peripheral side wall of the cavity (101), and the normal of the magnetic rollers (401) tangent to the braking surface (30112) does not pass through the center of the turntable (301);
a shifting block (201) is fixed on the input shaft (2), and each magnetic roller (401) is correspondingly provided with one shifting block (201);
a movable gap (3016) for the shifting block (201) to rotate is kept between the circumferential surface of the rotary disc (301) and the circumferential inner wall of the cavity (101), and the movable gap (3016) is communicated with the accommodating groove (3011);
the mounting sleeve (1), the turntable (301) and the shifting block (201) are all made of nonmagnetic materials.
2. The motor for a roll screen according to claim 1, wherein the openings of the two receiving grooves (3011) formed in the magnetic rollers (401) of the corresponding pair face away from each other, and the two magnetic rollers (401) of each pair magnetically repel each other toward the same end.
3. The motor for a roll screen according to claim 1, wherein the openings of the two receiving grooves (3011) formed in the pair of the magnetic rollers (401) are oriented to face each other, and the two magnetic rollers (401) of each pair are magnetically attracted toward the same end.
4. The motor for the roller shutter as claimed in any one of claims 1 to 3, wherein a connecting disc (203) is fixed on the input shaft (2), the shifting block (201) is fixed on the connecting disc (203), a cover plate (5) is detachably connected to one end of the mounting sleeve (1) departing from the through hole, a through groove for the input shaft (2) to penetrate through is formed in the cover plate (5), one side of the connecting disc (203) is rotatably matched with the rotary disc (301), the other side of the connecting disc is rotatably matched with the cover plate (5), and the peripheral surface of the connecting disc (203) is rotatably matched with the circumferential side wall of the cavity (101).
5. The motor for roller blinds according to any one of claims 1-4, wherein a rotating post (2031) is provided at the center of the connecting disc (203), a groove (3017) for connecting the rotating post (2031) is provided on one surface of the rotary disc (301) facing the input shaft (2), and the rotating post (2031) is rotatably engaged with the groove (3017).
6. The motor for roller blinds according to claim 1, 2, 3 or 5, characterized in that the gap between the circumferential surface of the magnetic roller (401) and the circumferential side wall of the cavity (101) when the magnetic roller (401) is located in the receiving portion (30111) is b, 0< b ≦ 0.3 mm.
7. A reverse braking motor for a roller shutter is characterized in that the reverse braking driver comprises an installation sleeve (1) with a cavity (101) arranged inside, a magnetic damping disc (6) fixed in the installation sleeve (1), an input shaft (2) and an output shaft (3) which are rotatably arranged in the installation sleeve (1), and the magnetic damping disc (6) is made of magnetic materials;
a rotary disc (301) is fixed on the output shaft (3), one end of the mounting sleeve (1) is closed, a through hole for the output shaft (3) to penetrate through is formed in the end of the mounting sleeve, the circumferential surface of the rotary disc (301) is rotatably matched with the circumferential side wall of the cavity (101), and the magnetic damping disc (6) is fixed on the inner wall, close to the through hole, of the cavity (101);
a reverse braking assembly (4) is arranged in the mounting sleeve (1), the reverse braking assembly (4) comprises magnetic rollers (401), every two of the magnetic rollers (401) are arranged in pairs, and a plurality of pairs of the magnetic rollers (401) are arranged in the circumferential direction of the turntable (301);
the magnetic rolling pieces (7) are adsorbed on the surface of the magnetic damping disc (6);
an accommodating groove (3011) is formed in the circumferential surface of the turntable (301) corresponding to each magnetic rolling piece (7), and the openings of the two accommodating grooves (3011) formed in the corresponding pair of magnetic rollers (401) face to the opposite directions or are opposite to each other;
the accommodating groove (3011) comprises an accommodating part (30111) and a braking surface (30112) connected with the accommodating part (30111);
when the magnetic rolling piece (7) is positioned in the accommodating part (30111), a gap is reserved between the peripheral surface of the magnetic rolling piece (7) and the peripheral side wall of the cavity (101), when the magnetic rolling piece (7) is positioned on the braking surface (30112), the magnetic rolling piece (7) is abutted against the peripheral side wall of the cavity (101), and the normal tangent to the braking surface (30112) of the magnetic roller (401) does not pass through the center of the turntable (301);
a shifting block (201) is fixed on the input shaft (2), and each magnetic rolling piece (7) is correspondingly provided with one shifting block (201);
a movable gap (3016) for the shifting block (201) to rotate is kept between the circumferential surface of the rotary disc (301) and the circumferential inner wall of the cavity (101), and the movable gap (3016) is communicated with the accommodating groove (3011);
the mounting sleeve (1), the turntable (301) and the shifting block (201) are all made of nonmagnetic materials.
8. The motor for roller blinds according to claim 7, characterized in that the magnetic rolling member (7) is a magnetic ball or a magnetic column.
9. The motor for the roller blind according to claim 7 or 8, characterized in that a connecting disc (203) is fixed on the input shaft (2), the shifting block (201) is fixed on the connecting disc (203), a cover plate (5) is detachably connected to one end of the mounting sleeve (1) departing from the through hole, a through groove for the input shaft (2) to penetrate through is arranged on the cover plate (5), one side of the connecting disc (203) is rotatably matched with the turntable (301), the other side of the connecting disc is rotatably matched with the cover plate (5), and the peripheral surface of the connecting disc (203) is rotatably matched with the circumferential side wall of the cavity (101);
the rotary table is characterized in that a rotary column (2031) is arranged in the center of the connecting disc (203), a groove (3017) for the rotary column (2031) to be connected is formed in one surface of the rotary table (301) facing the input shaft (2), and the rotary column (2031) is rotatably matched with the groove (3017).
10. The motor for roller blinds according to claim 7 or 8, wherein when the magnetic rolling member (7) is located in the accommodating part (30111), a gap between the circumferential surface of the magnetic rolling member (7) and the circumferential side wall of the cavity (101) is b, and 0< b ≦ 0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319846.8A CN114006499B (en) | 2021-11-09 | 2021-11-09 | Roller shutter motor comprising a reverse braking actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319846.8A CN114006499B (en) | 2021-11-09 | 2021-11-09 | Roller shutter motor comprising a reverse braking actuator |
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| CN114006499A true CN114006499A (en) | 2022-02-01 |
| CN114006499B CN114006499B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111319846.8A Active CN114006499B (en) | 2021-11-09 | 2021-11-09 | Roller shutter motor comprising a reverse braking actuator |
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| CH254373A (en) * | 1945-01-12 | 1948-04-30 | Applic Des Brevets Cotal Soc D | Monobloc motor assembly consisting of an electric motor combined with an electromechanical multi-speed transmission mechanism. |
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| CN202674098U (en) * | 2012-06-15 | 2013-01-16 | 山东大学 | Special backstop for rolling machine of vegetal greenhouse |
| CN112377537A (en) * | 2020-10-20 | 2021-02-19 | 北京精密机电控制设备研究所 | Dual-redundancy bidirectional backstop |
| CN113585949A (en) * | 2020-04-30 | 2021-11-02 | 宁波森瑞机电技术有限公司 | Non-return mechanism for electric curtain motor |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH254373A (en) * | 1945-01-12 | 1948-04-30 | Applic Des Brevets Cotal Soc D | Monobloc motor assembly consisting of an electric motor combined with an electromechanical multi-speed transmission mechanism. |
| CN202165491U (en) * | 2011-06-29 | 2012-03-14 | 刘文进 | Control mechanism of vehicle automatic energy-saving clutch |
| CN102705400A (en) * | 2012-05-29 | 2012-10-03 | 刘永春 | Unidirectional and bidirectional controllable bearing with double shifting forks |
| CN202674098U (en) * | 2012-06-15 | 2013-01-16 | 山东大学 | Special backstop for rolling machine of vegetal greenhouse |
| CN113585949A (en) * | 2020-04-30 | 2021-11-02 | 宁波森瑞机电技术有限公司 | Non-return mechanism for electric curtain motor |
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| CN114006499B (en) | 2023-09-12 |
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